CN201030448Y

CN201030448Y - Hollow boring bit

Info

Publication number: CN201030448Y
Application number: CNU2006200997177U
Authority: CN
Inventors: 刘著界; 农建军; 韦顺德
Original assignee: China Non-Ferrous Metal Industry Eleventh Metallurgical Installation Engineering
Current assignee: China Non-Ferrous Metal Industry Eleventh Metallurgical Installation Engineering
Priority date: 2006-10-26
Filing date: 2006-10-26
Publication date: 2008-03-05
Anticipated expiration: 2016-10-26

Abstract

A hollow boring bit for drilling and cutting metals relates to a machining instrument which comprises a drill body, a drill blade, a drill shank which is connected with a drill, wherein the drill body, the drill blade and the drill shank are distributed on an integrated hollow cylinder. The drill body is a cylinder of the hollow cylinder, the drill shank is positioned at the upper portion of the hollow cylinder, the drill handle is fixedly connected with a conical lengthen drill shank. The drill blade is arranged on the end surface of the lower portion of the hollow cylinder, the drill blade is a hackle cutting edge which is equally distributed on the circle of the end surface of the frill body. The drill body is provided with a spiral shaped scrap guiding groove along the cutting edge upward, wherein the spiral shaped scrap guiding groove is a drill shank which extends to the hollow drill along the space between the two hackle cutting edges upward from the end surface of the lower portion of the hollow cylinder. The angle of the spiral thread to the hollow drill body cylinder shaft line is 60 degrees to 70 degrees. The hollow drill head is applicable for drilling round holes with relative big hole diameter, high drilling and cutting efficiency, good drilling and cutting quality, convenient of burnishing the drill head on the metal with high hardness.

Description

A kind of hollow boring bit

Technical field:

The utility model relates to a kind of machinery tools, relates in particular to a kind of cutlery of drilling metal.

Background technology:

Metal processing usually needs boring, and the drill bit that is generally used for holing is many with fluted drill, but this kind drill bit can not be done very thickly, and when needing the bigger circular hole in drilling aperture, general drill bit is just powerless, brings great difficulty for boring processing.Development along with technology, people bring into use core drill, the core drill of Shi Yonging is used for the boring of building (mixing cob wall body etc. as cement) more in the market, the core drill that is used for drilling metal macropore is few, the patent No. discloses a kind of employing four hollow boring bits that blade is made of end face welding at hollow cylinder for the utility model patent " hard alloy hollow boring bit " of " 88218702 ", solved the boring problem of heavy caliber circular hole, but this drill bit does not have dregs guiding groove, during drilling smear metal easily and drill bit kink and influence drilling efficient; The patent No. has dregs guiding groove for the utility model patent " four sword hollow boring bits " of " 02278798 " on drill body, it is a very big progress, but this drill bit is the same with " hard alloy hollow boring bit ", on end face, only be provided with four blades, and blade broad, not high enough than die drilling efficient because of the drilling resistance that is subjected to during the higher metal of particularly drilling hardness during drilling, the quality of drilling is also good inadequately; The blade of this drill bit also is that method with soldering is welded on and bores on the body cylinder end face in addition, and is very inconvenient when the blade wearing and tearing need polishing or change blade.

The utility model content:

The technical problems to be solved in the utility model is: provide a kind of and be applicable to that drilling goes out the larger aperture circular hole on the higher metal of hardness, drilling efficient is higher, the drilling quality better, drill bit is polished hollow boring bit easily, to overcome the deficiency of above-mentioned prior art.

The technical scheme that the utility model is taked is: a kind of hollow boring bit that is used for the drilling metal, comprise the drill lip and the drillstock that is connected with rig that bore body, be used for the drilling metal, boring body, drill lip and drillstock is distributed on the hollow cylinder that fuses simultaneously, boring body is the cylindrical shell of hollow cylinder, drillstock is in hollow cylinder top, drill lip is in the lower end surface of hollow cylinder, this drill lip is to be evenly distributed on the serrated edge of boring on the body end face circumference, bores and upwards has spiral dregs guiding groove along blade on one's body.

The spirality dregs guiding groove that described brill is upwards left along blade on one's body is that the lower end surface from hollow cylinder begins along the drillstock that stretches upwards between two serrated edge until core drill, and the angle that the relative core drill of helix bores the body cylinder axis is 60～70 degree.

The hollow boring bit of the utility model compared with prior art has following beneficial effect:

1, can be on the higher metal of hardness drilling go out the circular hole of larger aperture and drilling efficient height, the drilling quality is good.Because the hollow boring bit of the utility model is a hollow cylindrical, its aperture can be made different sizes as required, bit face is a serrated edge, the blade of sufficient amount is evenly distributed on the circumference of bit face, material therefor has sufficiently high hardness through specially treated, thereby can the higher metal of drilling hardness, the brill of drill bit has spiral dregs guiding groove on one's body, the metal fillings that produces in the drilling can be discharged from dregs guiding groove, can not be wrapped in influences drilling on the drill bit, thereby efficient height, the drilling quality of the hollow boring bit drilling of use the utility model are good.

2, shock-resistant, long service life.Because the drill lip of the hollow boring bit of the utility model and bore body and fuse is shock-resistant, and drill lip directly processes boring the polishing of body cylinder end face, after drill lip is worn, can directly polish, and need not to change blade, and is not only convenient, and long service life.

3, of many uses, saving steel.The hollow boring bit drilling circular hole of employing the utility model only falls a circle metal drilling that is equivalent to the drill bit blade width during drilling, and the middle part-cylindric metal under boring can completely keep, and reserves for other use, and avoids waste of material; Therefore this drill bit both can be processed the drilling circular hole, can be used as the blanking tool that carries out circular material again, and one bores dual-purpose.

Be further described below in conjunction with the technical characterictic of drawings and Examples the hollow boring bit of the utility model.

Description of drawings:

Fig. 1～Fig. 4: the structural representation of the hollow boring bit of the utility model embodiment one:

Fig. 1: front view, Fig. 2: the main cutaway view, Fig. 3 looked: upward view, Fig. 4: stereogram;

Fig. 5: the structural representation of the hollow boring bit of the utility model embodiment two;

Fig. 6-1, Fig. 6-2: the hollow boring bit user mode reference diagram of the utility model embodiment one:

Fig. 6-1: in the hollow boring bit drilling process, Fig. 6-2: hollow boring bit has drilled workpiece;

Fig. 7-1, Fig. 7-2: the hollow boring bit user mode reference diagram of the utility model embodiment two:

Fig. 7-1: in the hollow boring bit drilling process, Fig. 7-2: hollow boring bit has drilled workpiece.Among the figure:

1-drillstock, 2-brill body, 3-serrated edge, 4-spirality dregs guiding groove;

5-radial drilling machine, 6-chuck, 71,72-hollow boring bit, 8-press anchor clamps, 9-workpiece,

10-parallels, 11-workbench, 12-drillstock adds long handle.

The specific embodiment:

Embodiment one:

A kind of hollow boring bit that is used for the drilling metal, comprise the brill body, the drill lip and the drillstock that is connected with rig that are used for the drilling metal, described brill body 2, drill lip 3 and drillstock 1 are distributed on the hollow cylinder that fuses simultaneously, described brill body 2 is cylindrical shells of hollow cylinder, drillstock 1 is in hollow cylinder top, drill lip 3 is in the lower end surface of hollow cylinder, this drill lip 3 is for being evenly distributed on the serrated edge of boring on the body end face circumference, bore on the body 2 and upwards have spirality dregs guiding groove 4 along blade, this spirality dregs guiding groove 4 is that the lower end surface from hollow cylinder begins along the drillstock 1 that stretches upwards between two serrated edge until core drill, the angle [alpha] that the relative core drills of spirality dregs guiding groove 4 bore body 2 cylinder axis is 60～70 degree, is evenly distributed on the serrated edge of boring body end face circumference and is 8 (referring to Fig. 1～Fig. 4).

During use, with on this hollow boring bit 71 on chuck 6, again by on the chuck 6 on radial drilling machine, get final product work, just in drilling process, Fig. 6-2: the expression hollow boring bit has drilled workpiece to Fig. 6-1 expression hollow boring bit.

Embodiment two:

A kind of band adds the hollow boring bit of the drilling metal of long handle, and its basic structure is with embodiment one, and institute's difference is: the drillstock that also is connected with a cone shape on the described hollow boring bit drillstock 1 adds long handle 12, makes things convenient for be connected (referring to the Fig. 5) with drilling machine.

During use, the drillstock 12 of this hollow boring bit 72 is directly gone up on radial drilling machine, got final product work, just in drilling process, Fig. 7-2: the expression hollow boring bit has drilled workpiece to Fig. 7-1 expression hollow boring bit.

As a kind of conversion of the utility model embodiment one, two, being evenly distributed on the serrated edge of boring body end face circumference can increase also and can reduce, generally between 5～12.

Hollow boring bit bores the diameter of body cylinder can make different specifications as required with length, uses to form serial instant; Stack shell generally adopts alloy tool steel, after machining through quenching with tempering heat treatment with its hardness of further raising.

Claims

1. hollow boring bit that is used for the drilling metal, comprise the drill lip and the drillstock that is connected with rig that bore body, be used for the drilling metal, it is characterized in that: described brill body (2), drill lip (3) and drillstock (1) are distributed on the hollow cylinder that fuses simultaneously, described brill body (2) is the cylindrical shell of hollow cylinder, drillstock (1) is in hollow cylinder top, drill lip (3) is in the lower end surface of hollow cylinder, this drill lip is to be evenly distributed on the serrated edge of boring on the body end face circumference, bores and upwards has spirality dregs guiding groove (4) along blade on one's body.

2. hollow boring bit according to claim 1 is characterized in that: the drillstock that is fixedly connected with a cone shape on the drillstock (1) adds long handle (12).

3. hollow boring bit according to claim 1 and 2, it is characterized in that: the spirality dregs guiding groove (4) that described brill is upwards left along blade on one's body is that the lower end surface from hollow cylinder begins along the drillstock that stretches upwards between two serrated edge until core drill, and the angle [alpha] that the relative core drill of the helix of spirality dregs guiding groove (4) bores the body cylinder axis is 60～70 degree.

4. hollow boring bit according to claim 1 and 2 is characterized in that: being evenly distributed on the serrated edge (3) of boring body end face circumference is 5～12.

5. hollow boring bit according to claim 3 is characterized in that: being evenly distributed on the serrated edge (3) of boring body end face circumference is 5～12.